Island



` (No Model.)

f E. THOMAS.

MOLDBRS PLASK.

Patented' Apr. 2Q, "1884.

5 provements iu Molders ties.

UNITED STATESA immane fri-tortas', or rAw'rUcKET, airone istmo.

PATENT OFFICE;

MoLDERsfLAsK.

SPECIFICATION forming part of Letters Patent No. 297,646, dated April29, 1884.

i Application filed February 6,1884. (No model.)

.To all whom, it may concern:

Be it known that I, 'ELEAZER THOMAS, of Pawtucket, Providencecounty,.Ithode Island, have invented certain new and useful Im- Flasks,of which the following is a specification, refereneebeing had to the`accompanying drawings, making part thereof'. Y I y The object of' thisinvention is to improve I@ melders flasks by providing them with sandframes or bands, and lwith corner-supports and adjustingscrews vorequivalent devices to hold saidframes in position in the flask; also, toprovide such sand-cleats with crossba-rs adjustable up and d own, ormade reversible therein,

The first of' these improvements-that is, supplying Athe flask andsand-frame with clamping-serews enables me to make the framesnzlliciently loose within the flask to permit its ready insertion andremoval-without opening the flask, and yet t0 hold the frames, sand, andmold firmly :in place, although the flask may be roughly handled orrolled over or around upon the bench, floor, or ground in the foundry.'.lhe second part of' my invention gives to the sand-mold ih the flaskintermediate support, permitting the parting ofthe mold at planes otherthan that of' the meeting of' the cope and nowel, so that, when thearticle to be molded demands it, the cross-bars may be placed in ahigher or a lower plane than the marginal parts of the cleat, toaccommodate the device to the work.

My invention consists in the devices and combinations of devices setforth in the appended claims.

In the drawings, Figure 1 is a plan of part of a flask and its inclosedsand-frame, show; ing a'suit-able .arrangement of' the Aclampingscrewswhich secure the latter in position, and also representing one of thecross-bars. Fi. 2 is a vertical section of one edge of the flask andsand-frame at line a: a: of Fig. 1, illustra-t,- ing the adjustablesupports of the cross-bar. Fig. 3 is an edge view of part ofthesandframe, showing the slot and screw for adjusting thecross-barvertically.

A and lower portions of the flask, having the usual devices for insuringtheir proper alignment.

E is the sand-frame-a rectangular marginal band having a vert-ical outerface to correspond to and fit loosely within the flask, and taperingfrom its lower edge upwardly,

or having both these peculiari r aces'in close contact,

I5 'are respectively the upper and so aste support the sand` packedwithin it. These frames rest at their corners upon their supports I),secured to the flask.

F F are clamping-screws, threaded to engage with the sides of` 'theflask, through which they pass, or withnufs fixed therein,

and bearing at their points against the vertical outer faces of the bandor frame E, so as to press it into firm contact with the-flask on theside opposite thereto. These screws are provided at one side only, or atone sideand one end, leaving the others free for the frame to bearagainst frictionally, so that the screws used will hold the parts infirm contact until .itis desired to remove the flask, when the pressureof the screws will be relaxed.

G is one of the cross-bars, spanning the frame from side to side, madeadjustable by any suitable means. rllhc drawings show a con venientarrangement l'or this purpose. The

end of the cross-bar is notched to correspond with similar horizontalnotches,lH, on the inner faces ol' the band or frame Il, and screws K,passing through conntersunk holes or slots L for-:aad in the frame,enter the, ends of the cross-bars and hohl the notched surthns fixingthe crossbars firmly to the marginal band. The countersinking of thescrew holes or slots prevents contac't of the screw -heads with theflask, While the notehing gives support, yet allows their adjustment upand down by lateral removal, 'and insertion in higher or lower notcheswhen the screws are withdrawn.

XVhen desired, the flask may be used with one or more of' the cross-barsremoved.

Having thus described this improvement of mine in melders flasks, what Iclaim as my invention, and desire to secure by Letters Patent, is--f 1.In combination with a molders flask provided with supports D, or theirequivalents, a marginal sand frame or band and one or moreclamping-screws adapted to. confine said frame or band within the flaskorrelease it therefrom, substantially as and for the purpose set forth.

2. In'combination with a molders flask, a marginal sand frame or bandprovided with removable and adjustable cross-bars, substan`L tially asand for the purpose set forth.

XITitaesses: ELEAZER THOMAS. WM. R. Salinas,

J. G. PERRY.

the bars reliable

